In a medium saucepan, melt margarine over low heat. Add chocolate chunks, and stir until melted. Remove from heat.
Stir in the agave syrup. Stir in eggs, 1 at a time. Add vanilla.
In a medium bowl, combine flour, cocoa, baking powder, and salt
Stir flour mixture into saucepan until blended.
Spoon the batter into the mini-muffin cups.
Bake for 10-12 minutes.